Wow that is really corroded, I would replace it.
Simply heating the pins of the clock IC and using some new solder would be
a good start.
Not sure about caps in Australia hopefully someone local can help out with
that question.
On 9/1/19, 5:23 AM, "M100 on behalf of Eric LK"
wrote:
>Fugu ME1
Fugu ME100 wrote:
> Do you have a picture of the thermistor?
I just put a few closeup pictures here: http://pics.lefauve.org/TH1/
I also added a picture of TH2 for comparison (that's supposed to be
the same component) and a few pictures of the RTC (they really didn't
put that much solder for this
Do you have a picture of the thermistor?
The bad time and locked keyboard are most likely related since the
keyboard scan interrupt is generated by the timer circuit from M18 pin 10
(TP). The problems you have possibly have a common root cause. One
option would be to reheat all the pins on M18
It's not really a surprise but after a couple of hours of usage, my
M100 froze and was back being stuck on the menu... so I continued
following the service manual troubleshooting instructions.
Philip Avery wrote:
> I too had this problem of random date data & unresponsive keyboard,
> albeit with a
The +5V looks good, the -5V is a bit low it would be better in the -4.9V
to -5.1V region. That should go up when the caps are replaced.
It sounds like there is a bad joint somewhere on the board.
I think most Model T owners have more than one unit :-D
On 7/1/19, 7:48 AM, "M100 on behalf of Eric
Thanks to all your precious advises!
After posting my message yesterday, I've read the service manual cover
to cover (I wish I could understand everything they say in there :o) )
and tried to measure the different voltages recommended in both your
emails and the service manual.
I noticed the flick
; on behalf of Stephen
Adolph mailto:twospru...@gmail.com>>
Reply-To: mailto:m...@bitchin100.com>>
Date: Sunday, January 6, 2019 at 7:44 AM
To: "m...@bitchin100.com <mailto:m...@bitchin100.com>"
mailto:m...@bitchin100.com>>
Subject: [M100] M100 stuck on the m
<mailto:m...@bitchin100.com>"
mailto:m...@bitchin100.com>>
Subject: [M100] M100 stuck on the menu with weird date :o(
I have at least one machine with this type of error. Would be great to figure
out what has to break for that to occur.
On Sun, Jan 6, 2019 at 8:37 AM Eric
I have at least one machine with this type of error. Would be great to
figure out what has to break for that to occur.
On Sun, Jan 6, 2019 at 8:37 AM Eric LK wrote:
> Hi,
>
> I'm still waiting for my replacement Ni-Cad battery but I've been
> continuing using my M100 without any other issue...
A quick check is to measure the voltages at the VDD and VEE test points
marked on the motherboard, they should be a strong +5V and -5V
respectively. From the fault you are reporting it sounds as if the main
motherboard voltages are bad. The NiCd should be about 3.7V when the
power is off. The ‘
Hi,
I'm still waiting for my replacement Ni-Cad battery but I've been
continuing using my M100 without any other issue... until tonight.
When I turned it on, the "low battery" light was on, and the date
displayed on the first line was wrong: ◥5ÿ 00,1919 Sun 00:00:00
I switched it off and on again
Your machine may not have been messed with prior, all my electrolytics were
dotted from the factory. Also, as far as the donuts go, there should be
only 5. They don't go on all the posts. You can see which ones they go on
in the exploded view of the technical reference manual for the 100 pg 58.
With the timely advice of Mr. Adolph I managed to extract the motherboard,
replace the mobo battery and several capacitors and fit it all back
together again.
With the board out it became clear that someone had been inside before me;
a number of the caps had black dots on them as though someone ha
Charles, the springs are seated in plastic holders that are part of the
bottom case. I use a pair of tweezers to tug the springs vertically, and
eventually they become freed from the bottom case.
..Steve
On Wed, Jan 2, 2019 at 8:07 AM Charles Hudson wrote:
> In preparation for repair of my M100
In preparation for repair of my M100 I have obtained the replacement
battery and capacitors, and have disassembled the case, separated the
display half from the motherboard and removed all of the screws. The half
of the board away from the battery tray is loose and can be lifted but the
other half
> -Original Message-
> From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of
> Stephen Adolph
> Sent: Monday, October 30, 2017 04:08
> To: m...@bitchin100.com
> Subject: Re: [M100] stuck T200 with REX main ROM management - need help
> recovering
>
Thanks for doing that testing!
Off the fop of my head I would say not. It has been a while since I looked
at the code but if REX is automatically switching to a bad ROM image on
power up..out of luck.
Sounds like an emergency switch is needed.
I personally don't like rom replacement. It is prone
> -Original Message-
> [...]
> Is there a trick to forcing it to go back to the primary image?
I should clarify that I can already think of a couple of 'sledgehammer' methods
for fixing this, ie. Re-doing the 4.9 REX software load process apparently
leaves the main ROM blocks alone, and
So I was feeling adventurous and after testing the main ROM management feature
of REX on an M100 that was apart (using a temporary jumper) I thought I'd go
ahead and implement it on my T200 since I only have one of those and wouldn't
be moving the REX to other machines.
In the process I came up
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